Product Description:

Our compatible Brother LC121BK/LC123BK black compatible ink
cartridges are filled with an incredible 16ml of high quality
compatible ink. These cross compatible cartridges come fully
chipped meaning they are compatible with a vast number of printers
that use both the LC121 and LC123 range of Brother ink
cartridges.

Designed to give a page yield in excess of the high capacity
Brother original LC123BK ink cartridges you can expect at least 600
pages from these cartridges (with an average 5% page coverage).
However this LC121BK/LC123BK compatible cartridge still comes with
a bargain price tag.